Upload woks but not for .ogg files

[eluser]A_funs[/eluser]
I have a working upload script for mp3 files, the config code is below, it works fine with mp3's but with ogg files it gives the error of
"the filetype you are attempting to upload is not allowed"

Code:

$config['upload_path'] = 'songs/';
       $config['allowed_types'] = 'mp3|ogg';
       $config['max_size'] = '10000';

Any ides why this is happening?